If you air balance you know that there are only two kinds of heat and they are determined by the type of work that the heat energy does. A vast majority of the time in Arizona we do not consider types of heat. The two heats are sensible heat and latent heat.
Sensible heat is the heat which actually changes the temperature of a substance without changing the original form. We add or remove sensible heat when we heat or cool air.
Latent heat will change the form of a substance without changing the original temperature. You can think of the moment heat changes water into steam. In the heating process our primary concern is sensible heat.
There are three main methods to transfer heat, (it will always be from a higher temperature to a lower temperature). The three methods are conduction, radiation and convection.
Conduction is the transfer of heat through a substance. An example of this would be the heat which transfers along an iron rod that is being heated on one end. The heat will travel along the rod to the other end. Conduction can also be a primary heat source; As in the case of one material being heated and that material coming in direct contact with another material.
Radiation is the transfer of heat through the air from one substance without significantly raising the temperature of the air. This would be experienced when the sun raises the temperature of the air on a roof while air surrounding the roof is much cooler
Convection is the transfer of heat by the movement of air or liquid. You can consider a forced air furnace where air is warmed as it passes over the furnace heat source and then is carried by convection to other rooms.
Heat is normally measured in BTUs (British Thermal Units). One BTU is the amount of heat required to raise one pound of water one degree Fahrenheit. This equals the amount of heat needed to raise about 55 cubic feet of air one degree Fahrenheit.